A:取25 g CuSO4·5H2O溶于1 L水中
B:将CuSO4·5H2O干燥去掉结晶水,取16 g溶于水制成1 L溶液
C:将25 g CuSO4·5H2O溶于水制成1 L溶液
D:取12.5 g CuSO4·5H2O溶于500 mL水中
— My little sister is crying now. What should I do to cheer her up?
—Maybe you can give her some snacks.
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